[richfaces-issues] [JBoss JIRA] (RF-10992) dragValue expression is evaluated to null in customcomponent

[Brian Leathem (Issue Comment Edited) (JIRA)]

    [ https://issues.jboss.org/browse/RF-10992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12643485#comment-12643485 ] 

Brian Leathem edited comment on RF-10992 at 11/16/11 2:59 PM:
--------------------------------------------------------------

Looks like the problem stems from upstream with [JAVASERVERFACES-2009|http://java.net/jira/browse/JAVASERVERFACES-2009]/[MYFACES-3283|https://issues.apache.org/jira/browse/MYFACES-3283]:
{quote}
The main problem is that if you reference a property of child component anywhere outside of the composite (i.e. in an action method, a component system event, etc.), it simply will not work if it was set to a composite component attribute (i.e. _#\{cc.attrs.property}_).
{quote}

Confirmed by taking the _dragValue_ assigned to the composite component, and applying it directly to the _dragSource_ (iow not using the _cc.attrs.dragSource_ peroperty), and the metamer sample works.

Feel free to comment/vote on the upstream issue, to see it resolved.
                
      was (Author: bleathem):
    Looks like the problem stems from upstream with JAVASERVERFACES-2009/MYFACES-3283:
{quote}
The main problem is that if you reference a property of child component anywhere outside of the composite (i.e. in an action method, a component system event, etc.), it simply will not work if it was set to a composite component attribute (i.e. _#\{cc.attrs.property}_).
{quote}

Confirmed by taking the _dragValue_ assigned to the composite component, and applying it directly to the _dragSource_ (iow not using the _cc.attrs.dragSource_ peroperty), and the metamer sample works.

Feel free to comment/vote on the upstream issue, to see it resolved.
                  
> dragValue expression is evaluated to null in customcomponent
> ------------------------------------------------------------
>
>                 Key: RF-10992
>                 URL: https://issues.jboss.org/browse/RF-10992
>             Project: RichFaces
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: component-drag/drop, third-party
>    Affects Versions: 4.0.0.Final
>         Environment: JSF2 environment with Richfaces 4 Final
>            Reporter: Adrian Höhn
>              Labels: customcomponent
>             Fix For: 4.Future
>
>         Attachments: dnd.png
>
>
> When the dragValue is set in a customcomponent, it's always evaluated to null. (dropEvent.getDragValue() == null)
> If a stringvalue is set instead, the value is submitted correctly.
> Example:
> {code}
> <rich:dragSource type="sometype" dragValue="#{cc.attrs.myvalue}"/>
> {code}
> same code outside of the customcomponent works fine.

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